Hitachi WJ200 Series

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Zero Hz Speed Detection Signal

The inverter outputs the 0Hz speed detection signal when the inverter output

frequency falls below the threshold level (C063).

To use this function, assign “21 (ZS)” to one of the intelligent output terminals.

Option

Code

Terminal

Symbol

Function Name State Description

ZS Zero Hz speed

detection signal

Output frequency is less than C063

OFF

Output frequency is not less than C063

alid for inputs:

11, 12, AL0 – AL2 Example for terminal [11] (default output

configuration shown – see page 3-90):

Example for terminal [AL0], [AL1], [AL2] (requires

output configuration – see page 4-52 and 3-90):

See I/O specs on page 4-6

Required settings

C063

Notes:

• The example circuit for terminal [11] drives a relay

coil. Note the use of a diode to prevent the

negative-going turn-off spike generated by the coil

from damaging the inverter’s output transistor.

Inverter output

terminal circuit

CM2 11

AL1

Power

supply

Load

AL0 AL2

Inverter logic

circuit board

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